Tab structure and method for manufacturing the same

Abstract

The present invention provides a tab structure and a method for manufacturing the tab structure, relating to the field of lithium battery technology, to address the problem of cold solder joints that are common when welding exposed and embedded portions in related technologies. The tab structure includes an exposed portion, an embedded portion, and a connecting adapter, wherein at least a portion of the exposed portion overlaps and connects with the embedded portion, and the connecting adapter connects the exposed and embedded portions. The provision of the connecting adapter in the present invention can avoid the risk of short circuits caused by cold solder joints.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a tab structure and a method for manufacturing the tab structure. Background Art

[0002] Tabs are a core component of lithium-ion polymer batteries that carries significant safety risks. They are crucial for welding the internal structure of the battery cell and external components. For example, batteries for mobile phones, Bluetooth devices, and laptops all require tabs.

[0003] Among them, during welding, the tail of the tab is connected to the electrode core body. Since the thickness of the tail of the tab is quite different from the thickness of the electrode core body, this will reduce the energy density of the electrode core body. Therefore, the "T-type tab" is often used in the existing method. The "T-type tab" includes an exposed part and an embedded part, wherein the embedded part is thinner and the exposed part is thicker. One end of the embedded part is connected to the electrode core body, and the other end of the embedded part is connected to the exposed part.

[0004] However, in the conventional method, when welding the exposed portion and the embedded portion, a cold weld problem easily occurs. Summary of the Invention

[0005] In order to solve at least one of the problems mentioned in the background technology, the present invention provides a pole ear structure and a method for manufacturing the pole ear structure. By providing a connecting adapter portion, the welding area between the exposed portion and the embedded portion can be increased, thereby avoiding the risk of short circuit due to cold welding during welding, and improving the safety of use.

[0006] In order to achieve the above objectives, in a first aspect, the present invention provides a tab structure, comprising an exposed portion, an embedded portion and a connecting transition portion, wherein at least part of the exposed portion overlaps and is connected to the embedded portion, and the connecting transition portion connects the exposed portion and the embedded portion.

[0007] In the above-mentioned tab structure, optionally, the connection adapter portion includes a first connection portion and at least two second connection portions, and the at least two second connection portions are arranged at intervals and connected to the first connection portion;

[0008] At least one first connection area is provided on the first connection portion, and at least one second connection area is provided on each second connection portion. The first connection area is connected to the exposed portion, and the second connection area is connected to the embedded portion.

[0009] In the above-mentioned tab structure, optionally, an extension portion is provided on the embedded portion, and the extension portion forms the connecting adapter portion; and the extension portion is connected to the exposed portion.

[0010] In the above-mentioned tab structure, optionally, at least two connection areas are provided on the exposed portion at intervals, one of the connection areas is located on an end portion of the exposed portion close to the embedded portion, and the connection area close to the embedded portion is connected to the embedded portion;

[0011] The connection area at a side away from the embedded portion is connected to the extension portion.

[0012] In the above-mentioned tab structure, optionally, at least two connection areas are arranged in parallel on the exposed portion.

[0013] In the above-mentioned tab structure, optionally, tab glue is further included, and the tab glue covers the exposed portion, the connecting portion and the embedded portion.

[0014] In the above-mentioned tab structure, optionally, the tab glue covers the outer surface of one side of the exposed portion, the connecting portion and the embedded portion;

[0015] Alternatively, the tab glue covers the outer surfaces of both sides of the exposed portion, the connecting portion and the embedded portion.

[0016] In the above-mentioned tab structure, optionally, the thickness of the connecting portion is between 50-80 μm;

[0017] The peripheral corners of the connecting adapter portion are arranged as chamfered structures.

[0018] In the above-mentioned tab structure, optionally, the width of the exposed portion is between 2-10 mm, the thickness of the exposed portion is between 50-100 μm, the width of the embedded portion is between 4-30 mm, and the thickness of the embedded portion is between 30-50 μm;

[0019] The cross-sectional area of ​​the exposed portion is equal to the cross-sectional area of ​​the embedded portion.

[0020] In a second aspect, the present invention provides a method for manufacturing a tab structure, which is used to manufacture the above-mentioned tab structure. The method for manufacturing the tab structure comprises:

[0021] connecting the exposed portion and the embedded portion;

[0022] connecting the connecting adapter portion and the exposed portion;

[0023] Connecting the connecting portion and the embedded portion to form a tab structure;

[0024] Flattening and dust removal of weld marks on the outer surface of the tab structure;

[0025] The tab glue is covered on the outer surfaces of the exposed portion, the connecting portion and the embedded portion by adopting a hot pressing fusion and then cold pressing method.

[0026] The tab structure and the method for manufacturing the tab structure provided by the present invention increase the welding area between the exposed portion and the embedded portion by providing a connecting adapter portion, thereby improving the welding firmness between the exposed portion and the embedded portion and solving the risk of short circuit caused by loose welding in the prior art.

[0027] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the tab structure, electrode core, and soft-pack battery provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is an exploded schematic diagram of the exposed portion, embedded portion, and connecting adapter portion of the first structure provided by the present invention;

[0030] Figure 2 An assembly diagram of the exposed portion, embedded portion, and connecting adapter portion of the first structure provided by the present invention;

[0031] Figure 3 This is an exploded schematic diagram of the exposed portion, embedded portion, and connecting adapter portion of the second structure provided by the present invention;

[0032] Figure 4 An assembly diagram of the exposed portion, embedded portion, and connecting adapter portion of the second structure provided by the present invention;

[0033] Figure 5 It is a schematic flow chart of the method for manufacturing the tab structure provided by the present invention.

[0034] Description of reference numerals:

[0035] 100-ear structure;

[0036] 10-exposed part;

[0037] 11- third connection area;

[0038] 12- fourth connection area;

[0039] 20-inlaid part;

[0040] 21- extension;

[0041] 30-connection adapter;

[0042] 31- first connecting portion;

[0043] 311-first connection area;

[0044] 32- second connecting portion;

[0045] 321-second connection area;

[0046] 40-ear glue;

[0047] 41-first sealant;

[0048] 42-Second sealant. DETAILED DESCRIPTION

[0049] Tabs are a component of soft-pack lithium-ion battery products. Batteries have positive and negative electrodes. Tabs are metal conductors that lead the positive and negative electrodes from the electrode core. These tabs serve as the contact points during charging and discharging. The positive electrode of a battery is made of aluminum (Al), while the negative electrode is made of nickel (Ni). Nickel-plated copper (Ni-Cu) is also available. Both are composed of a composite of film and metal strips.

[0050] The traditional tab structure is straight. When the tab is connected to the electrode core body, the tab needs to extend along the long side or short side direction of the electrode core body, that is, it needs to remain straight. Therefore, when packaging, the overall length or width of the electrode core body needs to include the protruding part of the tab. This will cause a large difference in thickness between the tab and the electrode core body, and on the other hand, shorten the effective length of the electrode core body, thereby reducing the energy density of the electrode core body.

[0051] In order to improve the energy density of the electrode core body, "T-type tabs" are often used in the prior art, wherein the "T-type tab" refers to a tab whose longitudinal cross-section is "T"-shaped, wherein the "T-type tab" includes an exposed portion and an embedded portion, wherein the thickness of the embedded portion is thinner, and the thickness of the exposed portion is thicker, one end of the embedded portion is connected to the electrode core body, and the other end of the embedded portion is connected to the exposed portion, and ultrasonic welding is used to weld the embedded portion and the exposed portion together. However, due to the different thicknesses of the embedded portion and the exposed portion, a cold weld is prone to occur during welding, wherein a cold weld is a common line fault, which refers to a problem of poor welding or loose welding during the welding process.

[0052] In order to solve the above technical problems, the present invention provides a tab structure and a method for manufacturing the tab structure. The tab structure includes an exposed portion, an embedded portion and a connecting transition portion. At least part of the exposed portion overlaps and is connected with the embedded portion. The connecting transition portion connects the exposed portion and the embedded portion.

[0053] By setting a connecting adapter part, the connecting adapter part connects the first connecting area and the embedded part, thereby increasing the welding area between the exposed part and the embedded part, improving the welding firmness between the exposed part and the embedded part, and solving the risk of short circuit caused by loose welding in the prior art.

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0055] Figure 1 This is an exploded schematic diagram of the exposed portion, embedded portion, and connecting adapter portion of the first structure provided by the present invention. Figure 2 This is an assembly diagram of the exposed portion, embedded portion, and connecting portion of the first structure provided by the present invention. Figure 3 This is an exploded schematic diagram of the exposed portion, embedded portion, and connecting adapter portion of the second structure provided by the present invention. Figure 4 This is an assembly diagram of the exposed portion, embedded portion, and connecting portion of the second structure provided by the present invention. Figure 5 It is a schematic flow chart of the method for manufacturing the tab structure provided by the present invention.

[0056] Example 1

[0057] Reference Figures 1 to 4 As shown, an embodiment of the present invention provides a tab structure 100, which may include an exposed portion 10, an embedded portion 20, and a connecting adapter portion 30, wherein at least a portion of the exposed portion 10 overlaps and connects with the embedded portion 20, that is, there is an overlapping area between the exposed portion 10 and the embedded portion 20. Specifically, the area of ​​the overlapping area is not limited in this embodiment. Thus, during assembly, the exposed portion 10 is positioned above the embedded portion 20, and the connecting adapter portion 30 connects the exposed portion 10 and the embedded portion 20, that is, the connecting adapter portion 30 can serve as an intermediate welding portion, which can increase the welding area between the exposed portion 10 and the embedded portion 20 and avoid the problem of weak welding.

[0058] Among them, in this embodiment, the welding method between the connection adapter part 30 and the exposed part 10 can be ultrasonic welding, laser welding, riveting, current storage welding, current welding or spot welding, etc. Similarly, the connection method between the connection adapter part 30 and the embedded part 20 can also adopt the above method. In this embodiment, ultrasonic welding and laser welding are specifically used as examples for explanation, which has the advantages of easy operation and good welding effect.

[0059] It should be noted that the dimensions of the exposed portion 10, the embedded portion 20, and the connecting adapter portion 30 are not further limited, as they can be set according to the model or size of the electrode core. As long as the welding area can be increased and the problem of cold welds when welding the exposed portion 10 and the embedded portion 20 is solved, it falls within the scope of protection of this application. In addition, the shape of the connecting adapter portion 30 is also not further limited.

[0060] The tab structure 100 provided by the present invention includes an exposed portion 10, an embedded portion 20 and a connecting adapter portion 30. At least part of the exposed portion 10 is overlapped and connected with the embedded portion 20. The connecting adapter portion 30 connects the exposed portion 10 and the embedded portion 20. By providing the connecting adapter portion 30, the connecting adapter portion 30 connects the exposed portion 10 and the embedded portion 20, thereby increasing the welding area between the exposed portion 10 and the embedded portion 20, improving the welding firmness between the exposed portion 10 and the embedded portion 20, and solving the risk of short circuit caused by loose welding in the prior art.

[0061] Furthermore, in this embodiment, the configuration of the connection adapter portion 30 may include multiple implementations. In this embodiment, the following two configurations are specifically described as examples:

[0062] One possible way to achieve this is as follows: Figure 1 and Figure 2 As shown, the connection adapter 30 may include a first connection portion 31 and at least two second connection portions 32, wherein the at least two second connection portions 32 are spaced apart and connected to the first connection portion 31. For example, two second connection portions 32 may be included, three second connection portions 32 may be included, or a plurality of second connection portions 32 may be included. In this embodiment, two second connection portions 32 are specifically provided as an example, and the two second connection portions 32 are respectively connected to the two ends of the first connection portion 31. At least one first connection area 311 is provided on the first connection portion 31, and at least one second connection area 321 is provided on the two second connection portions 32. Similarly, there is no specific limitation on the number of first connection areas 311 and second connection areas 321.

[0063] Among them, at least two connection areas can be arranged at intervals on the exposed part 10. In this embodiment, the setting of two connection areas is specifically taken as an example for explanation. For example, a third connection area 11 and a fourth connection area 12 are arranged on the exposed part 10, wherein the third connection area 11 is located on the end of the exposed part 10 close to the embedded part 20, and the fourth connection area 12 is located on the side of the exposed part 10 away from the embedded part 20.

[0064] So when assembling, Figure 2 As shown, the first connection area 311 is connected to the exposed part 10, the two second connection areas 321 are connected to the embedded part 20, and the third connection area 11 is connected to the embedded part 20, wherein the number of welding points set on the first connection area 311, the second connection area 321 and the third connection area 11 is not further limited. By setting the first connection area 311, the connection between the connection adapter part 30 and the exposed part 10 is realized, and the welding area between the connection adapter part 30 and the exposed part 10 is increased. Secondly, by setting the second connection area 321, the connection between the connection adapter part 30 and the embedded part 20 is realized, and the welding area between the connection adapter part 30 and the embedded part 20 is increased.

[0065] Another possible implementation method is as follows: Figure 3 and Figure 4 As shown, an extension portion 21 can be provided on the embedded portion 20, wherein the extension portion 21 forms a connecting adapter portion 30, and a fourth connection area 12 is provided on the exposed portion 10, so that during assembly, the fourth connection area 12 is connected to the extension portion 21, thereby realizing the connection between the exposed portion 10 and the embedded portion 20. Secondly, by also providing the fourth connection area 12 on the exposed portion 10, even when the third connection area 11 on the exposed portion 10 has a problem of cold welding during welding, the risk of short circuit can be avoided, thereby improving the safety of use.

[0066] It should be noted that, in this embodiment, the connecting portion 30 formed by the extending portion 21 and the embedded portion 20 are integrally formed.

[0067] Furthermore, at least two connection areas are arranged in parallel on the exposed portion 10, that is, the third connection area 11 is parallel to the fourth connection area 12. In this way, when the third connection area 11 is connected to the embedded portion 20, the connection area can be increased, thereby improving the stability of the connection; similarly, when the fourth connection area 12 is connected to the extension portion 21, the connection area can also be increased, thereby improving the stability of the connection.

[0068] Furthermore, the thickness of the connection adapter part 30 can be between 50-80μm. For example, the thickness of the connection adapter part 30 can be 50μm, the thickness of the connection adapter part 30 can be 70μm, and the thickness of the connection adapter part 30 can also be 80μm. This is not further limited in the present embodiment. By setting the thickness of the connection adapter part 30 to be between 50-80μm, on the one hand, it can avoid the problem of not being able to increase the welding area when the thickness of the connection adapter part 30 is too thin, and on the other hand, it can avoid the problem of loose welding when the thickness of the connection adapter part 30 is too thick.

[0069] In addition, by setting the corners of the connection adapter part 30 as a chamfered structure and the corners of the third connection area 11 as a chamfered structure, when the connection adapter part 30 is welded to the exposed part 10 and the embedded part 20 respectively, the probability of gaps and bubbles being generated between the connection adapter part 30 and the exposed part 10 and the embedded part 20 can be reduced, thereby improving the quality of the battery.

[0070] Furthermore, the width of the exposed portion 10 can be between 2-10 mm, and the thickness of the exposed portion 10 can be between 50-100 μm. For example, the width of the exposed portion 10 can be 2 mm, the width of the exposed portion 10 can be 5 mm, and the width of the exposed portion 10 can also be 10 mm. Similarly, the thickness of the exposed portion 10 can be 50 μm, the thickness of the exposed portion 10 can be 80 μm, and the thickness of the exposed portion 10 can also be 100 μm. This embodiment does not further limit this.

[0071] In addition, the width of the embedded portion 20 can be between 4-30 mm, and the thickness of the embedded portion 20 can be between 30-50 μm. For example, the width of the embedded portion 20 can be 4 mm, the width of the embedded portion 20 can be 15 mm, the width of the embedded portion 20 can also be 30 mm, the thickness of the embedded portion 20 can be 30 μm, the thickness of the embedded portion 20 can be 40 μm, and the thickness of the embedded portion 20 can also be 50 μm. No further limitation is made in this embodiment.

[0072] It should be noted that, in this embodiment, by setting the thickness of the embedded part 20 to be smaller than the thickness of the exposed part 10, when the embedded part 20 is connected to the electrode core body, the problem of large difference in thickness between the tab and the electrode core body is avoided, thereby solving the problem of poor consistency in thickness of the electrode core body in the prior art and improving the energy density of the electrode core body.

[0073] Among them, the product of the width of the exposed part 10 and the thickness of the exposed part 10 is equal to the product of the width of the embedded part 20 and the thickness of the embedded part 20, that is, the cross-sectional area of ​​the exposed part 10 is equal to the cross-sectional area of ​​the embedded part 20. In this way, even if the size of the exposed part 10 is different from the size of the embedded part 20, the longitudinal cross-sectional areas of the exposed part 10 and the embedded part 20 can still be ensured to be equal. At the same time, the exposed part 10 and the embedded part 20 are overlapped and connected, that is, the exposed part 10 and the embedded part 20 are overlapped and welded, which can ensure that the current flow capacity of the electrode core body is the same.

[0074] Furthermore, it also includes a tab glue 40, wherein the tab glue 40 covers the exposed part 10, the connection adapter part 30 and the embedded part 20; or, the tab glue 40 covers the first connection area 311, the second connection area 321, the third connection area 11 and the fourth connection area 12, which helps to improve the stability of the connection during packaging.

[0075] Among them, one possible implementation method is: the tab glue 40 covers the outer surface of one side of the exposed portion 10, the connecting adapter portion 30 and the embedded portion 20; the second possible implementation method is: the tab glue 40 covers the outer surfaces of both sides of the exposed portion 10, the connecting adapter portion 30 and the embedded portion 20. Among them, when both sides of the outer surface are covered, the connection stability can be further improved, thereby avoiding the problem of cold solder joints.

[0076] Specifically, the ear glue 40 may include a first sealant 41 and a second sealant 42. The first sealant 41 covers the surfaces of the first connection area 311, the second connection area 321 and the third connection area 11, and the second sealant 42 covers the surface of the embedded part 20. The exposed part 10, the embedded part 20 and the connecting adapter part 30 are tightly fitted with the ear glue 40. In this way, bubbles are not easily generated during packaging, thereby avoiding the problem of bubbles running around in the ear glue 40 and affecting the airtight performance of the electrode core body.

[0077] In this embodiment, the ear glue 40 can be a plastic part. For example, the ear glue 40 can be made of PP plastic material, wherein PP plastic can include OPP (oriented polypropylene), CPP (cast polypropylene), and PPF (polypropylene fiber). Among them, OPP refers to oriented polypropylene, which is characterized by good sealing and strong anti-counterfeiting properties; CPP refers to unstretched polypropylene, which is characterized by excellent water vapor and odor barrier properties; multifunctional, can be used as a composite material base film; can be metallized; as food and commodity packaging and outer packaging, it has excellent demonstration properties, so that the product can still be clearly visible under the packaging; PPF refers to polypropylene fiber, which is light in weight, high in strength, good in elasticity, wear-resistant, corrosion-resistant, and has the characteristics of electrical insulation and warmth retention.

[0078] Example 2

[0079] Reference Figure 5 As shown, this embodiment provides a method for manufacturing a tab structure, which is used to manufacture the tab structure 100 in the first embodiment. The method for manufacturing the tab structure 100 may include:

[0080] S1: Connecting the exposed portion 10 and the embedded portion 20. The step of connecting the exposed portion 10 and the embedded portion 20 may include:

[0081] The exposed portion 10 is positioned above the embedded portion 20, with at least a portion of the exposed portion 10 overlapping and contacting the embedded portion 20. By overlapping and connecting the exposed portion 10 and the embedded portion 20, the welding area between the exposed portion 10 and the embedded portion 20 can be increased.

[0082] In the step of connecting the exposed part 10 and the embedded part 20, a third connection area 11 is provided on the exposed part 10. By providing the third connection area 11, the exposed part 10 and the embedded part 20 are connected, thereby increasing the welding area between the exposed part 10 and the embedded part 20.

[0083] The overlapping size between the exposed portion 10 and the embedded portion 20 can be between 2-5 mm, wherein the overlapping size in this embodiment can be the overlapping length. For example, the overlapping size between the exposed portion 10 and the embedded portion 20 can be 2 mm, the overlapping size between the exposed portion 10 and the embedded portion 20 can be 3 mm, and the overlapping size between the exposed portion 10 and the embedded portion 20 can also be 5 mm.

[0084] After the exposed portion 10 and the embedded portion 20 are connected, the exposed portion 10 and the embedded portion 20 are welded. Ultrasonic welding can be used for connection, which has the advantages of easy operation and good welding effect.

[0085] S2: Connecting the connecting portion 30 and the exposed portion 10 .

[0086] In which, in the step of connecting the connection adapter part 30 and the exposed part 10, a first connection part 31 and two opposite second connection parts 32 can be provided on the connection adapter part 30, and the two ends of the first connection part 31 are respectively connected to the two second connection parts 32, and a first connection area 311 is provided on the first connection part 31. By setting the first connection area 311, the connection between the connection adapter part 30 and the exposed part 10 is realized, and the welding area between the connection adapter part 30 and the exposed part 10 is increased.

[0087] After the connection adapter portion 30 and the exposed portion 10 are connected, ultrasonic welding and then laser welding may be used for connection, which is not specifically limited in this embodiment.

[0088] S3: Connect the connecting portion 30 and the embedded portion 20 to form a tab structure.

[0089] In the step of connecting the connection adapter part 30 and the embedded part 20, a second connection area 321 is provided on the second connection part 32. By providing the second connection area 321, the connection between the connection adapter part 30 and the embedded part 20 is realized, thereby increasing the welding area between the connection adapter part 30 and the embedded part 20.

[0090] After the adapter portion 30 and the embedded portion 20 are connected, ultrasonic welding and then laser welding may be used for connection, which is not specifically limited in this embodiment.

[0091] S4: After the step of connecting the adapter portion 30 and the embedded portion 20 to form the tab structure 100, the process further includes: flattening and removing dust from the weld marks on the outer surface of the tab structure 100, so that the outer surface of the tab structure 100 reaches a target flatness.

[0092] S5: After the steps of flattening and dust removal of the weld marks on the outer surface of the tab structure 100, the process further includes: covering the tab glue 40 on the outer surfaces of the exposed portion 10, the connecting portion 30 and the embedded portion 20 by hot pressing and then cold pressing.

[0093] Among them, in the step of covering the ear glue 40, the ear glue 40 may include a first sealant 41 and a second sealant 42. The first sealant 41 covers the surface of the first connection area 311, the second connection area 321 and the third connection area 11, and the second sealant 42 covers the surface of the embedded part 20. The exposed part 10, the embedded part 20 and the connection adapter part 30 are tightly fitted with the ear glue 40. In this way, bubbles are not easily generated during packaging, thereby avoiding the problem of bubbles running around in the ear glue 40 and affecting the airtight performance of the electrode core body.

[0094] In this embodiment, the ear glue 40 can be a plastic part. For example, the ear glue 40 can be made of PP plastic material, wherein PP plastic can include OPP (oriented polypropylene), CPP (cast polypropylene), and PPF (polypropylene fiber). Among them, OPP refers to oriented polypropylene, which is characterized by good sealing and strong anti-counterfeiting properties; CPP refers to unstretched polypropylene, which is characterized by excellent water vapor and odor barrier properties; multifunctional, can be used as a composite material base film; can be metallized; as food and commodity packaging and outer packaging, it has excellent demonstration properties, so that the product can still be clearly visible under the packaging; PPF refers to polypropylene fiber, which is light in weight, high in strength, good in elasticity, wear-resistant, corrosion-resistant, and has the characteristics of electrical insulation and warmth retention.

[0095] In the description of the embodiments of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "welded" should be understood in a broad sense. For example, it can be fixed welding, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0096] The terms "first," "second," "third," "fourth," and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tab structure, characterized in that: The welded joint comprises an exposed portion, an embedded portion, and a connecting adapter portion, wherein at least a portion of the exposed portion overlaps and connects with the embedded portion, a third connecting area is provided on the exposed portion, and the exposed portion is connected to the embedded portion via the third connecting area; the connecting adapter portion connects the exposed portion and the embedded portion; the connecting adapter portion is used to increase the welding area between the exposed portion and the embedded portion; The connecting adapter portion includes a first connecting portion and at least two second connecting portions, wherein the at least two second connecting portions are spaced apart and connected to the first connecting portion; At least one first connection area is provided on the first connection portion, and at least one second connection area is provided on each second connection portion. The first connection area is connected to the exposed portion, and the second connection area is connected to the embedded portion.

2. The tab structure according to claim 1, characterized in that: The thickness of the connecting portion is between 50-80 μm; The peripheral corners of the connecting adapter portion are arranged as chamfered structures.

3. The tab structure according to claim 1, characterized in that: It also includes tab glue, which covers the exposed portion, the connecting portion and the embedded portion.

4. The tab structure according to claim 3, characterized in that: The tab glue is covered on the outer surface of one side of the exposed portion, the connecting portion and the embedded portion; Alternatively, the tab glue covers the outer surfaces of both sides of the exposed portion, the connecting portion and the embedded portion.

5. The tab structure according to claim 1, characterized in that: The width of the exposed portion is between 2 and 10 mm, the thickness of the exposed portion is between 50 and 100 μm, the width of the embedded portion is between 4 and 30 mm, and the thickness of the embedded portion is between 30 and 50 μm; The cross-sectional area of ​​the exposed portion is equal to the cross-sectional area of ​​the embedded portion.

6. A method for manufacturing a tab structure, characterized in that: For manufacturing the tab structure according to any one of claims 1 to 5, the manufacturing method of the tab structure comprises: connecting the exposed portion and the embedded portion; connecting the connecting adapter portion and the exposed portion; Connecting the connecting portion and the embedded portion to form a tab structure; Flattening and dust removal of weld marks on the outer surface of the tab structure; The tab glue is covered on the outer surfaces of the exposed portion, the connecting portion and the embedded portion by adopting a hot pressing fusion and then cold pressing method.

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